/*******************************************************************************
 * Copyright 2009 DCSpectrometer - http://code.google.com/p/dcspectrometer 
 *  
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 *  
 *     http://www.apache.org/licenses/LICENSE-2.0 
 *     
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License. 
 *******************************************************************************/
package com.dcspectrometer.kmeansclustering;

import java.awt.Point;
import java.awt.geom.Point2D;

@SuppressWarnings("serial")
public class ClusterPoint extends Point{
  private Cluster _cluster;
  private double _distanceSquareToCentroid;

  public ClusterPoint(int x, int y) {
    super(x,y);
    this._cluster = null;
  }

  public ClusterPoint(Point point) {
    super(point);
    this._cluster = null;
  }

  public void setCluster(Cluster cluster) {
    this._cluster = cluster;
    recalculateDistanceToCentroid();
  }

  public void recalculateDistanceToCentroid() {
    _distanceSquareToCentroid = getDistanceSquareToCentroid(_cluster.getCentroid());
  }

  public double getDistanceSquareToCentroid(Point2D.Double centroid) {
    return distanceSq(centroid);
  }

  public Cluster getCluster() {
    return _cluster;
  }

  public double getDistanceSquareToCentroid() {
    return _distanceSquareToCentroid;
  }
}
